How can I make my animation play for longer than 250 Frames?
Changing the Length of Your Animation

In order to see a longer preview of your animation, you need to make your animation itself longer. To do this, you can change end End Frame of your animation in several places:


Properties Editor > Render tab > Dimensions panel: Set End Frame to a higher value
Timeline area: Increase the End value
Timeline area: Place the green frame cursor on the desired end frame, press E to set it as new End


NOTE: Changing the End frame in any of these places changes it in all the other places also